CN108341662A - 一种低介电常数低损耗高频陶瓷基板材料的制备方法 - Google Patents
一种低介电常数低损耗高频陶瓷基板材料的制备方法 Download PDFInfo
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Abstract
本发明公开了一种低介电常数低损耗高频陶瓷基板材料的制备方法,包括如下步骤:根据比例配置好原料,然后加入酒精进行球磨混料;将球磨后的浆液放入烘箱中进行烘干;烘干研磨后的粉料加入固化剂继续进行研磨,充分混合并磨碎磨细,干压成型得到生坯;将生坯放入炉子里面烧结得到氧化铝陶瓷板材料。本发明加入钴元素来降低介电常数,制作工艺简单,成本低,操作周期短,无毒无害无污染,且制作出来的陶瓷电路板经过SEM测试,致密性能好,通过矢量网络分析仪测试介电性能和低损耗都能满足5G情况下的频率要求,是理想的高频电路板基板材料。
Description
技术领域
本发明涉及一种低介电常数低损耗高频陶瓷基板材料的制备方法,属于高频电子陶瓷及其制备领域,特别涉及到当今5G技术的发展对电路基板高频性能和低损耗的要求。
背景技术
目前正在开发的5G技术是基于毫米波的,当电路的设计达到毫米波频段,预估和控制电路的损耗尤为重要。对于高频电路基板,损耗主要包括介质损耗、导体损耗、辐射损耗和泄露损耗几个部分,氧化铝陶瓷电路基板有很好的效果能降低损耗。低温烧结氧化铝陶瓷将大大降低高频电路板的成本。
氧化铝俗称刚玉,具有硬度大,因此制作出来的电路基板也具有硬度大的特点,氧化铝陶瓷的抗弯强度可以达到250Mpa,并且具有很好的高频性能。
目前市面上的高频陶瓷电路板价格比较昂贵,无法达到2020年5G技术普及的要求,因此急需一种成本低、性能好的高频电路基板,本发明希望能缓解这个问题。
发明内容
发明目的:为了克服现有技术中存在的不足,本发明提供一种低介电常数低损耗高频陶瓷基板材料的制备方法,具有工艺简单、成本低、制作周期短等特点,制作的陶瓷电路板,经矢量网络分析仪测试,介电性能和低损耗都能满足5G情况下的频率要求。
技术方案:为实现上述目的,本发明采用的技术方案为:
一种低介电常数低损耗高频陶瓷基板材料的制备方法,包括以下具体步骤:
S1配料:选用AR级的Al2O3、SiO2、CaO、CoO为原料进行配比混合;
S2混料:将配好的原料放进球磨罐,加入酒精进行球磨混料;
S3烘干:球磨后的浆料放进烘箱进行烘干,烘干后放到研钵中进行研磨粉碎;
S4成型:将研碎后的粉料加入粘结剂后,在研钵中继续充分研磨,将研磨好的粉体放进模具里面,然后用干粉压力机进行干压成型为圆片状坯体;
S5烧结:将压好的生坯放到炉子里进行预烧和烧结,得到氧化铝陶瓷电路基板材料成品。
进一步的,所述步骤S1中配料Al2O3的含量为95%-96%,SiO2的含量为0.6%-1.5%,CaO的含量为0.6%-1.5%,CoO的含量为0.5%-1.5%。
进一步的,所述步骤S2中放在无水乙醇中球磨的时间为4-6个小时,球磨速度为每分钟300-500转。
进一步的,所述步骤S3中烘箱里的温度为100-120度,保持没有灰尘落入样品,用研钵研磨粉碎的时间为10-30分钟。
进一步的,所述步骤S4中所加入的粘结剂为聚乙烯醇含量5%的溶液,且干压成型的压力为15-20Mpa,干压的时间为25-30分钟。
进一步的,所述步骤S5中预烧控制的温度参数如下:
①从室温升到200度,用时20-30分钟;
②从200度升温到400度,用时90-120分钟;
③从400度升温到600度,用时15-20分钟;
④在600度保温700-800分钟;
⑤从600度降到室温,用时500-600分钟;
下一步进行正式烧结,具体温度参数如下:
⑥从室温升到300度,用时20-30分钟;
⑦从300度升温到1400度,用时400-500分钟;
⑧从1400度升温到1600度,用时150-200分钟;
⑨在1600度保温400-500分钟;
⑩从1600度降到1400度,用时200-300分钟;
从1400度降到室温,用时500-600分钟。
有益效果:本发明提供的一种低介电常数低损耗高频陶瓷基板材料的制备方法,相对于现有技术,具有以下优点:(1)本发明加入钴元素来降低介电常数,制作工艺简单,成本低,操作周期短,重复性能好,适合量产;(2)无毒无害,不污染环境,无浪费;(3)制作出来的陶瓷电路板经过SEM测试,致密性能好,通过矢量网络分析仪测试介电性能和低损耗都能满足5G情况下的频率要求,是理想的高频电路板基板材料。
具体实施方式
下面结合实施例对本发明作更进一步的说明。
实施例1:一种低温烧结低介电常数低损耗高频陶瓷基板材料的制备方法
称取氧化铝的含量为9.6g,二氧化硅的含量为0.15g,氧化钙的含量为0.15g,氧化钴的含量为0.1g。总配料为10g,加入无水乙醇500g,然后放入球磨罐中,然后放入球磨机开始球磨,球磨的时间为5个小时,球磨速度为每分钟300转。球磨好的浆液放进烘箱进行烘干,然后把烘干好的原料放在研钵里面研磨,时间为15分钟,加入5%的PVA(聚乙烯醇)溶液两滴作为固化剂(粘结剂),在研钵中继续充分研磨30分钟,然后放进干压机进行干压,干压时间为30分钟,压力18Mpa,取出后放进炉子进行预烧和烧结,最后得到成品。
预烧和烧结温度参数如下:
①从室温升到200度,用时20分钟;
②从200度升温到400度,用时120分钟;
③从400度升温到600度,用时15分钟;
④在600度保温700分钟;
⑤从600度降到室温,用时500分钟。
⑥从室温升到300度,用时20分钟;
⑦从300度升温到1400度,用时4000分钟;
⑧从1400度升温到1600度,用时150分钟;
⑨在1600度保温400分钟;
⑩从1600度降到1400度,用时200分钟;
从1400度降到室温,用时500分钟。
将得到的基板用矢量网络分析仪,用谐振腔方法测试其介电性能,得到实施例1方法得到的基板的介电常数为6.86,介电损耗正切值为0.00024。
实施例2:一种低温烧结低介电常数低损耗高频陶瓷基板材料的制备方法
称取氧化铝的含量为9.58g,二氧化硅的含量为0.14g,氧化钙的含量为0.15g,氧化钴的含量为0.13g。总配料为10g,加入无水乙醇500g,然后放入球磨罐中,然后放入球磨机开始球磨,球磨的时间为4个小时,球磨速度为每分钟300转。球磨好的浆液放进烘箱进行烘干,然后把烘干好的原料放在研钵里面研磨,时间为20分钟,加入5%的PVA溶液两滴作为固化剂,在研钵中继续充分研磨30分钟,然后放进干压机进行干压,时间为30分钟,压力18MPa,取出后放进炉子进行预烧和烧结,最后得到成品。
预烧和烧结温度参数如下:
①从室温升到200度,用时20分钟;
②从200度升温到400度,用时120分钟;
③从400度升温到600度,用时15分钟;
④在600度保温600分钟;
⑤从600度自然降到室温。
⑥从室温升到300度,用时20分钟;
⑦从300度升温到1400度,用时4000分钟;
⑧从1400度升温到1600度,用时150分钟;
⑨在1600度保温400分钟;
⑩从1600度降到1400度,用时200分钟;
从1400度自然降到室温。
将得到的基板用矢量网络分析仪,用谐振腔方法测试其介电性能,得到实施例2方法得到的基板的介电常数为6.75,介电损耗正切值为0.00029。
以上所述仅是本发明的优选实施方式,应当指出:对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (6)
1.一种低介电常数低损耗高频陶瓷基板材料的制备方法,其特征在于,包括以下具体步骤:
S1配料:选用AR级的Al2O3、SiO2、CaO、CoO为原料进行配比混合;
S2混料:将配好的原料放进球磨罐,加入酒精进行球磨混料;
S3烘干:球磨后的浆料放进烘箱进行烘干,烘干后放到研钵中进行研磨粉碎;
S4成型:将研碎后的粉料加入粘结剂后继续研磨,将研磨后的粉体进行干压成型为圆片状坯体;
S5烧结:将压好的生坯放到炉子里进行预烧和烧结,得到氧化铝陶瓷电路基板材料成品。
2.根据权利要求1所述的一种低介电常数低损耗高频陶瓷基板材料的制备方法,其特征在于,所述步骤S1中配料Al2O3的含量为95%-96%,SiO2的含量为0.6%-1.5%,CaO的含量为0.6%-1.5%,CoO的含量为0.5%-1.5%。
3.根据权利要求1所述的一种低介电常数低损耗高频陶瓷基板材料的制备方法,其特征在于,所述步骤S2中放在无水乙醇中球磨的时间为4-6个小时,球磨速度为每分钟300-500转。
4.根据权利要求1所述的一种低介电常数低损耗高频陶瓷基板材料的制备方法,其特征在于,所述步骤S3中烘箱里的温度为100-120度,用研钵研磨粉碎的时间为10-30分钟。
5.根据权利要求1所述的一种低介电常数低损耗高频陶瓷基板材料的制备方法,其特征在于,所述步骤S4中所加入的粘结剂为聚乙烯醇含量5%的溶液,且干压成型的压力为15-20Mpa,干压的时间为25-30分钟。
6.根据权利要求1所述的一种低介电常数低损耗高频陶瓷基板材料的制备方法,其特征在于,所述步骤S5中预烧控制的温度参数如下:
①从室温升到200度,用时20-30分钟;
②从200度升温到400度,用时90-120分钟;
③从400度升温到600度,用时15-20分钟;
④在600度保温700-800分钟;
⑤从600度降到室温,用时500-600分钟;
下一步进行正式烧结,具体温度参数如下:
⑥从室温升到300度,用时20-30分钟;
⑦从300度升温到1400度,用时400-500分钟;
⑧从1400度升温到1600度,用时150-200分钟;
⑨在1600度保温400-500分钟;
⑩从1600度降到1400度,用时200-300分钟;
从1400度降到室温,用时500-600分钟。
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